Composition useful as an organic water/oxygen barrier material, OLED display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9768412-B2
Application number	US-201514892295-A
Country	US
Kind code	B2
Filing date	Jun 8, 2015
Priority date	Jun 16, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A composition which can be used as an organic water/oxygen barrier material, an OLED display device and manufacturing method thereof are disclosed. The composition includes: 15-25 wt % of parylene, 15-25 wt % of polyvinyl chloride, 5-15 wt % of acetone, 5-15 wt % of trichloroethylene, 10-20 wt % of polyvinyl acetate, 5-15 wt % of polyvinyl alcohol, 0-5 wt % of SiO 2 nanoparticles, and 8-12 wt % of an organic solvent, wherein all weight percent values are based on the total weight of the composition. When a water/oxygen barrier layer fabricated by the composition is disposed between a luminescent layer of OLED and a light extraction layer, water vapor and oxygen gas can be prevented from entering the OLED luminescent layer, thereby prolonging the service life of the OLED luminescent layer.

First claim

The invention claimed is:

1. A composition comprising:
15-25 wt % of parylene,
15-25 wt % of polyvinyl chloride,
5-15 wt % of acetone,
5-15 wt % of trichloroethylene,
10-20 wt % of polyvinyl acetate,
5-15 wt % of polyvinyl alcohol,
0-5 wt % of SiO 2 nanoparticles, and
8-12 wt % of an organic solvent,
wherein all weight percent values are based on the total weight of he composition.

2. The composition claimed as claim 1 , wherein the composition comprises 3 to 5 wt % of SiO 2 nanoparticles.

3. The composition claimed as claim 1 , wherein the organic solvent is isopropanol or ethyl acetate.

4. The composition claimed as claim 1 , wherein the average particle diameter of the SiO 2 nanoparticles is smaller than or equal to 50 nm.

5. An organic water/oxygen barrier material comprising the composition of claim 1 .

6. An organic light-emitting diode (OLED) display device, comprising a water/oxygen baffler layer provided between an OLED luminescent layer and a light extraction layer, the water/oxygen barrier layer being formed by using the composition claimed as claim 1 .

7. The OLED display device claimed as claim 6 , further comprising an electrode disposed on a light exiting side of the OLED luminescent layer, the water/oxygen barrier layer being located between the electrode and the light extraction layer.

8. The OLED display device claimed as claim 6 , wherein the water/oxygen barrier layer has a thickness in the range of 15 to 20 μm.

9. The organic water/oxygen barrier material claimed as claim 5 , wherein the composition comprises 3 to 5 wt % of SiO 2 nanoparticles.

10. The organic water/oxygen barrier material claimed as claim 5 , wherein the organic solvent is isopropanol or ethyl acetate.

11. The organic water/oxygen barrier material claimed as claim 5 , wherein the average particle diameter of the SiO 2 nanoparticles is smaller than or equal to 50 nm.

12. The OLED display device claimed as claim 6 , wherein the composition comprises 3 to 5 wt % of SiO 2 nanoparticles.

13. The OLED display device claimed as claim 6 , wherein the organic solvent is isopropanol or ethyl acetate.

14. The OLED display device claimed as claim 6 , wherein the average particle diameter of the SiO 2 nanoparticles is smaller than or equal to 50 nm.

15. A method for manufacturing an organic light-emitting diode (OLED) display device, comprising:
forming an OLED luminescent layer on a back panel;
forming a water/oxygen barrier layer on a light exiting side of the OLED luminescent layer, wherein, the water/oxygen barrier layer is formed by using the composition comprising: 15-25 wt % of parylene, 15-25 wt % of polyvinyl chloride, 5-15 wt % of acetone, 5-15 wt % of trichloroethylene, 10-20 wt % of polyvinyl acetate, 5-15 wt % of polyvinyl alcohol, 0-5 wt % of SiO 2 nanoparticles, and 8-12 wt % of an organic solvent, wherein all weight percent values are based on the total weight of the composition
forming a light extraction layer on a light exiting side of the water/oxygen barrier layer; and
performing encapsulation.

16. The manufacturing method claimed as claim 15 , wherein forming the water/oxygen barrier layer on the light exiting side of the OLED luminescent layer includes:
coating or depositing the composition on a surface of the OLED luminescent layer;
curing the composition.

17. The manufacturing method claimed as claim 16 , wherein the curing is performed by way of drying or heating.

18. The method claimed as claim 15 , wherein the composition comprises 3 to 6 wt % of SiO 2 nanoparticles.

19. The method claimed as claim 15 , wherein the organic solvent is isopropanol or ethyl acetate.

20. The method claimed as claim 15 , wherein the average particle diameter of the SiO 2 nanoparticles is smaller than or equal to 50 nm.

Assignees

• Boe Technology Group Co Ltd
• Ordos Yuansheng Optoelectronics Co Ltd
• Ordos Yuansheng Optoelectronics Tech Co Ltd

Inventors

• Wu Haidong

Classifications

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• H01L2251/5369

  Electricity · mapped topic

• C08L27/06 Primary

  Homopolymers or copolymers of vinyl chloride · CPC title

• H01L51/5262

  Electricity · mapped topic